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author | Ulrich Drepper <drepper@redhat.com> | 2000-06-08 19:54:27 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2000-06-08 19:54:27 +0000 |
commit | 2715f28ad4494dcf5da41398a6dbf2e43042620d (patch) | |
tree | fb103624f45a43a68e3be22ee61f43d2e3732645 /linuxthreads/sysdeps/pthread/posix-timer.h | |
parent | 47bc7a9be10c67151eaf0eed7f895c77d3f820d1 (diff) | |
download | glibc-2715f28ad4494dcf5da41398a6dbf2e43042620d.tar.gz glibc-2715f28ad4494dcf5da41398a6dbf2e43042620d.tar.xz glibc-2715f28ad4494dcf5da41398a6dbf2e43042620d.zip |
Update.
* sysdeps/pthread/Makefile: New file. Add rules to build timer functionality. * sysdeps/unix/sysv/linux/bits/local_lim.h: Add TIMER_MAX. 2000-06-04 Kaz Kylheku <kaz@ashi.footprints.net> * sysdeps/pthread/posix-timer.h: New file. * sysdeps/pthread/timer_create.c: New file. * sysdeps/pthread/timer_delete.c: New file. * sysdeps/pthread/timer_getoverr.c: New file. * sysdeps/pthread/timer_gettime.c: New file. * sysdeps/pthread/timer_routines.c: New file. * sysdeps/pthread/timer_settime.c: New file. * sysdeps/pthread/tst-timer.c: New file. 2000-06-08 Ulrich Drepper <drepper@redhat.com>
Diffstat (limited to 'linuxthreads/sysdeps/pthread/posix-timer.h')
-rw-r--r-- | linuxthreads/sysdeps/pthread/posix-timer.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/linuxthreads/sysdeps/pthread/posix-timer.h b/linuxthreads/sysdeps/pthread/posix-timer.h new file mode 100644 index 0000000000..fcb61aa733 --- /dev/null +++ b/linuxthreads/sysdeps/pthread/posix-timer.h @@ -0,0 +1,168 @@ +/* Definitions for POSIX timer implementation on top of LinuxThreads. + Copyright (C) 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Kaz Kylheku <kaz@ashi.footprints.net>. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <limits.h> +#include <signal.h> + +/* Double linked list. */ +struct list_links +{ + struct list_links *next; + struct list_links *prev; +}; + + +/* Forward declaration. */ +struct timer_node; + + +/* Definitions for an internal thread of the POSIX timer implementation. */ +struct thread_node +{ + struct list_links links; + pthread_attr_t attr; + pthread_t id; + unsigned int exists; + struct list_links timer_queue; + pthread_cond_t cond; + struct timer_node *current_timer; + pthread_t captured; +}; + + +/* Internal representation of a timer. */ +struct timer_node +{ + struct list_links links; + struct sigevent event; + clockid_t clock; + struct itimerspec value; + struct timespec expirytime; + pthread_attr_t attr; + unsigned int abstime; + unsigned int armed; + unsigned int inuse; + struct thread_node *thread; +}; + + +/* Static array with the structures for all the timers. */ +extern struct timer_node __timer_array[TIMER_MAX]; + +/* Global lock to protect operation on the lists. */ +extern pthread_mutex_t __timer_mutex; + +/* Variable to protext initialization. */ +extern pthread_once_t __timer_init_once_control; + +/* Nonzero if initialization of timer implementation failed. */ +extern int __timer_init_failed; + +/* Node for the thread used to deliver signals. */ +extern struct thread_node __timer_signal_thread; + + +/* Return pointer to timer structure corresponding to ID. */ +static inline struct timer_node * +timer_id2ptr (timer_t timerid) +{ + if (timerid >= 0 && timerid < TIMER_MAX && __timer_array[timerid].inuse) + return &__timer_array[timerid]; + + return NULL; +} + +/* Return ID of TIMER. */ +static inline int +timer_ptr2id (struct timer_node *timer) +{ + return __timer_array - timer; +} + + +/* Timespec helper routines. */ +static inline int +timespec_compare (const struct timespec *left, const struct timespec *right) +{ + if (left->tv_sec < right->tv_sec) + return -1; + if (left->tv_sec > right->tv_sec) + return 1; + + if (left->tv_nsec < right->tv_nsec) + return -1; + if (left->tv_nsec > right->tv_nsec) + return 1; + + return 0; +} + +static inline void +timespec_add (struct timespec *sum, const struct timespec *left, + const struct timespec *right) +{ + sum->tv_sec = left->tv_sec + right->tv_sec; + sum->tv_nsec = left->tv_nsec + right->tv_nsec; + + if (sum->tv_nsec >= 1000000000) + { + ++sum->tv_sec; + sum->tv_nsec -= 1000000000; + } +} + +static inline void +timespec_sub (struct timespec *diff, const struct timespec *left, + const struct timespec *right) +{ + diff->tv_sec = left->tv_sec - right->tv_sec; + diff->tv_nsec = left->tv_nsec - right->tv_nsec; + + if (diff->tv_nsec < 0) + { + --diff->tv_sec; + diff->tv_nsec += 1000000000; + } +} + + +/* We need one of the list functions in the other modules. */ +static inline void +list_unlink (struct list_links *list) +{ + list->next->prev = list->prev; + list->prev->next = list->next; + list->next = list; + list->prev = list; +} + + +/* Functions in the helper file. */ +extern void __timer_mutex_cancel_handler (void *arg); +extern void __timer_init_once (void); +extern struct timer_node *__timer_alloc (void); +extern int __timer_thread_start (struct thread_node *thread); +extern struct thread_node *__timer_thread_find_matching (const pthread_attr_t *desired_attr); +extern struct thread_node *__timer_thread_alloc (const pthread_attr_t *desired_attr); +extern void __timer_dealloc (struct timer_node *timer); +extern void __timer_thread_dealloc (struct thread_node *thread); +extern int __timer_thread_queue_timer (struct thread_node *thread, + struct timer_node *insert); +extern void __timer_thread_wakeup (struct thread_node *thread); |